/Engine/Plugins/Online/OnlineServices/Source/OnlineServicesInterface/Public/Online/OnlineServicesRegistry.h
Get list of all instantiated OnlineServices
void GetAllServicesInstances ( [TArray](API\Runtime\Core\Containers\TArray)< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IOnlineServices](API\Plugins\OnlineServicesInterface\Online\IOnlineServices) >> & OutOnlineServices ) const